The migration of 63Ni into 18Cr-10wt%Ni samples of 3N-purity, or samples doped with 0.007wt%S, was investigated at 700 to 1050C (table 92) by using the Suzuoka method. It was found that the presence of S increased the true diffusion kinetics of Ni. It was concluded that segregation led to the precipitation of compounds of Cr and S at the grain boundaries. The kinetics of Ni diffusion were unaffected by precipitates.
D.Juve-Duc, D.Treheux: Acta Metallurgica, 1984, 32[11], 2063-8
Table 91
Interdiffusion of Mn in Fe-Cr-Ni Couples
Temperature (C) | Couple | D (m2/s) |
1000 | Fe-18Cr-10Ni-2.1Mn/Fe-18Cr-10Ni-0.1Mn | 7.10 x 10-16 |
1000 | Fe-17Cr-16Ni-1.9Mn/Fe-17Cr-16Ni-0.1Mn | 4.60 x 10-16 |
1050 | Fe-18Cr-10Ni-2.1Mn/Fe-18Cr-10Ni-0.1Mn | 1.57 x 10-15 |
1080 | Fe-17Cr-16Ni-1.9Mn/Fe-17Cr-16Ni-0.1Mn | 2.35 x 10-15 |
1080 | Fe-29Cr-2Ni-2Mn/Fe-29Cr-2Ni-0.1Mn | 2.33 x 10-15 |
1080 | Fe-28Cr-4Ni-2Mn/Fe-28Cr-4Ni-0.1Mn | 2.35 x 10-15 |
1080 | Fe-25Cr-2Ni-2Mn/Fe-25Cr-2Ni-0.2Mn | 1.96 x 10-15 |
1125 | Fe-29Cr-2Ni-2Mn/Fe-29Cr-2Ni-0.1Mn | 4.04 x 10-15 |
1125 | Fe-28Cr-4Ni-2Mn/Fe-28Cr-4Ni-0.1Mn | 3.96 x 10-15 |
1125 | Fe-25Cr-2Ni-2Mn/Fe-25Cr-2Ni-0.2Mn | 4.15 x 10-15 |
1150 | Fe-18Cr-10Ni-2.1Mn/Fe-18Cr-10Ni-0.1Mn | 7.50 x 10-15 |
1160 | Fe-17Cr-16Ni-1.9Mn/Fe-17Cr-16Ni-0.1Mn | 1.13 x 10-14 |
1180 | Fe-29Cr-2Ni-2Mn/Fe-29Cr-2Ni-0.1Mn | 9.70 x 10-15 |
1180 | Fe-28Cr-4Ni-2Mn/Fe-28Cr-4Ni-0.1Mn | 8.80 x 10-15 |
1180 | Fe-25Cr-2Ni-2Mn/Fe-25Cr-2Ni-0.2Mn | 9.51 x 10-15 |
1200 | Fe-18Cr-10Ni-2.1Mn/Fe-18Cr-10Ni-0.1Mn | 1.43 x 10-14 |
1245 | Fe-17Cr-16Ni-1.9Mn/Fe-17Cr-16Ni-0.1Mn | 2.50 x 10-14 |
1250 | Fe-18Cr-10Ni-2.1Mn/Fe-18Cr-10Ni-0.1Mn | 2.60 x 10-14 |
1255 | Fe-29Cr-2Ni-2Mn/Fe-29Cr-2Ni-0.1Mn | 1.98 x 10-14 |
1255 | Fe-25Cr-2Ni-2Mn/Fe-25Cr-2Ni-0.2Mn | 1.72 x 10-14 |
1299 | Fe-29Cr-2Ni-2Mn/Fe-29Cr-2Ni-0.1Mn | 2.68 x 10-14 |
1299 | Fe-28Cr-4Ni-2Mn/Fe-28Cr-4Ni-0.1Mn | 3.45 x 10-14 |
1299 | Fe-25Cr-2Ni-2Mn/Fe-25Cr-2Ni-0.2Mn | 2.09 x 10-14 |
1305 | Fe-17Cr-16Ni-1.9Mn/Fe-17Cr-16Ni-0.1Mn | 7.56 x 10-14 |